NGV Fuel Systems

 

There are three types of NGV fuel systems:

  • Dedicated: Vehicles designed to run only on natural gas.
  • Bi-fuel: Vehicles designed to run on EITHER natural gas or on gasoline.
  • Dual-fuel: Vehicles designed to run on BOTH natural gas and Diesel.

Light-duty and medium-duty vehicles typically utilize dedicated or bi-fuel systems while heavy-duty vehicles utilize dedicated or dual-fuel systems. With all three types of NGV fuel systems, natural gas is stored in on-board tanks as CNG or LNG.

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Bi-Fuel CNG or Gasoline

Light-duty natural gas vehicles perform and function much like gasoline-powered vehicles with spark-ignited engines. A CNG fuel system transfers high-pressure natural gas from the vehicle’s storage tank to the engine compartment where pressure is reduced to the operating pressure of the engine’s fuel-management system. An LNG fuel system holds natural gas at cryogenic temperatures (~ -260 deg F) as a low-pressure (5-100 psi) liquefied natural gas.

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Dedicated CNG

Light-duty natural gas vehicles perform and function much like gasoline-powered vehicles with spark-ignited engines. A CNG fuel system transfers high-pressure natural gas from the vehicle’s storage tank to the engine compartment where pressure is reduced to the operating pressure of the engine’s fuel-management system. An LNG fuel system holds natural gas at cryogenic temperatures (~ -260 deg F) as a low-pressure (5-100 psi) liquefied natural gas.

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Dual-Fuel CNG and Diesel

Light-duty natural gas vehicles perform and function much like gasoline-powered vehicles with spark-ignited engines. A CNG fuel system transfers high-pressure natural gas from the vehicle’s storage tank to the engine compartment where pressure is reduced to the operating pressure of the engine’s fuel-management system. An LNG fuel system holds natural gas at cryogenic temperatures (~ -260 deg F) as a low-pressure (5-100 psi) liquefied natural gas.

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